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拖拉机 气缸套 设计 夹具

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内容简介：

摘 要气缸体是发动机的主体，它将各个气缸和曲轴箱连成一体，是安装活塞、曲轴以及其他零件和附件的支承骨架。气缸体的工作条件十分恶劣。它要承受燃烧过程中压力和温度的急剧变化以及活塞运动的强烈摩擦。 气缸套是柴油机的重要零件，内孔加工是气缸套生产过程中的一道重要工序，突破内孔加工夹具的传统设计思想，采用新型的内孔加工夹具，阐明该夹具的设计原理和方法。本设计以柴油机汽缸套为例，对汽缸套的夹紧定位及其工艺过程和夹具的设计。在对汽缸套的工艺规程采用两销一面对其进行定位以限制其六个自由度。为减少汽缸套在加工过程中的误差，我考虑基准的重合原则，统一原则，互为基准原则以及粗基准的选择原则，为使定位夹紧可靠，要求所用的粗基准尽可能不重复使用原则。详细阐述了汽缸套的加工工艺过程，对加工过程中进行的各道工序进行了详尽的说明，并附有零件图，加工工艺过程卡等资料加以说明，使汽缸套的加工过程一目了然。关键词：汽缸套 工艺规程 夹具AbstractAn is foundation spare parts that machine that keeping with parts, it machine with have the spare parts conjunction in the parts a the whole, and make right mutually position, complete the essential sport.Therefore, the a processes the quantity to affect the function of the machine directly, accuracy with life span.A spare parts though each of shape, the size is different, but they all have the cavity, the construction is complicated, thick not on an equal footing common characteristics in wall, on a wall the higher bearings in current and many accuracy props up the peaceful in bore demand processes, having again the lower and tight in a lot of accuracy bore demand process.Therefore, the difficulty that a not only need the part that process many, but also process is bigger too.This design controls with the CK6142 number the lather principal axis a number for example, detailedly expatiating a controls to process the craft process, in the process to process the each work preface that proceed proceeded in details of elucidation, and fish-eye spare parts diagram, work preface Chiens diagram, the number controls the machine bed processes craft Chiens card, the number controls to process the work preface card, the knife has card and numbers control to process the procedure, entering to take into the route diagram etc. data the assistance explain, making a bo